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MPI_Win_wait(3) 			     LAM/MPI				  MPI_Win_wait(3)

       MPI_Win_wait -  Completes an RMA exposure epoch

       #include <mpi.h>
       int MPI_Win_wait(MPI_Win win)

       win    - window object (handle)

       Completes  an  RMA  exposure  epoch  started  by  a call to MPI_WIN_POST on win. This call
       matches calls to MPI_WIN_COMPLETE(win) issued by each of the origin  processes  that  were
       granted	access to the window during this epoch. The call to MPI_WIN_WAIT will block until
       all matching calls to MPI_WIN_COMPLETE have occurred. This guarantees that all these  ori-
       gin  processes  have  completed	their  RMA  accesses  to  the local window. When the call
       returns, all these RMA accesses will have completed at the target window.

       All MPI routines in Fortran (except for MPI_WTIME and MPI_WTICK ) have an additional argu-
       ment ierr at the end of the argument list.  ierr is an integer and has the same meaning as
       the return value of the routine in C.  In Fortran, MPI routines are subroutines,  and  are
       invoked with the call statement.

       All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in Fortran.

       The  IMPI  standard  only supports MPI-1 functions.  Hence, this function is currently not
       designed to operate within an IMPI job.

       If an error occurs in an MPI function, the current MPI error handler is called  to  handle
       it.   By default, this error handler aborts the MPI job.  The error handler may be changed
       with MPI_Errhandler_set ; the predefined error handler MPI_ERRORS_RETURN may  be  used  to
       cause  error values to be returned (in C and Fortran; this error handler is less useful in
       with the C++ MPI bindings.   The  predefined  error  handler  MPI::ERRORS_THROW_EXCEPTIONS
       should  be  used in C++ if the error value needs to be recovered).  Note that MPI does not
       guarantee that an MPI program can continue past an error.

       All MPI routines (except MPI_Wtime and MPI_Wtick ) return an error value;  C  routines  as
       the value of the function and Fortran routines in the last argument.  The C++ bindings for
       MPI do not return error values; instead, error values are communicated by throwing  excep-
       tions  of  type	MPI::Exception	(but  not by default).	Exceptions are only thrown if the
       error value is not MPI::SUCCESS

       Note that if the MPI::ERRORS_RETURN handler is set in C++, while MPI functions will return
       upon an error, there will be no way to recover what the actual error value was.
	      - No error; MPI routine completed successfully.
	      - Invalid window.  A common error is to use a null window in a call.
	      -  This  error indicates than an operation has been attempted on a "closed" window.
	      Certain one-sided operations can only be performed on windows whose epoch has  been
	      started with MPI_Win_start.

       MPI_Put(3),    MPI_Get(3),   MPI_Win_create(3),	 MPI_Win_start(3),   MPI_Win_complete(3),
       MPI_Win_fence(3), MPI_Win_free(3), MPI_Win_get_group(3), MPI_Win_get_group(3), MPI_Accumu-

       For  more information, please see the official MPI Forum web site, which contains the text
       of both the MPI-1 and MPI-2 standards.  These documents contain detailed information about
       each MPI function (most of which is not duplicated in these man pages).



LAM/MPI 6.5.8				    11/10/2002				  MPI_Win_wait(3)
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